Developer conveyance device and image forming apparatus

a conveyancing device and conveyancing technology, applied in the direction of electrographic process equipment, instruments, optics, etc., can solve the problems of increasing cost and bulky devices

Active Publication Date: 2015-05-21
RICOH KK
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0008]An embodiment of the present invention provides an image forming apparatus that includes a developer conveyance device to transport developer, using a positive-displacement pump to alternately generate positive pressure and negative pressure by changing a volume of an internal space thereof, a destination developer container to which the developer conveyance device transports developer; a sensor provided to the destination developer container, to detect developer in the destination developer container; and a controller to control the positive-displacement pump according to a detection result generated by the sensor. The controller disables detection of developer by the sensor during a non-detection period that starts from a stop of the positive-displacement pump.

Problems solved by technology

Thus, the device becomes bulkier, and the cost increases.

Method used

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  • Developer conveyance device and image forming apparatus
  • Developer conveyance device and image forming apparatus

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Embodiment Construction

[0022]In describing preferred embodiments illustrated in the drawings, specific terminology is employed for the sake of clarity. However, the disclosure of this patent specification is not intended to be limited to the specific terminology so selected, and it is to be understood that each specific element includes all technical equivalents that operate in a similar manner and achieve a similar result.

[0023]As used herein, the singular forms “a”, “an” and “the” are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms “includes” and / or “including”, when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and / or groups thereof. Further, the order of steps in control procedures is not limited to the orde...

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Abstract

An image forming apparatus includes a developer conveyance device to transport developer, using a positive-displacement pump to alternately generate positive pressure and negative pressure by changing a volume of an internal space thereof, a destination developer container to which the developer conveyance device transports developer, a sensor provided to the destination developer container, to detect developer in the destination developer container, and a controller to control the positive-displacement pump according to a detection result generated by the sensor. The controller disabled detection of developer by the sensor in a non-detection period that starts from a stop of the positive-displacement pump.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS[0001]This patent application is based on and claims priority pursuant to 35 U.S.C. §119(a) to Japanese Patent Application Nos. 2013-240775 filed on Nov. 21, 2013 and 2014-165797 filed on Aug. 18, 2014 in the Japan Patent Office, the entire disclosure of each of which is hereby incorporated by reference herein.BACKGROUND[0002]1. Technical Field[0003]Embodiments of the present invention generally relate to a developer conveyance device and an electrophotographic image forming apparatus, such as a copier, a printer, a facsimile machine, or a multifunction peripheral (MFP) having at least two of copying, printing, facsimile transmission, plotting, and scanning capabilities, that includes the developer conveyance device.[0004]2. Description of the Related Art[0005]In electrophotographic image forming apparatuses, it is proposed to use a positive-displacement pump to transport developer that is either toner or a mixture of toner and carrier (hereina...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): G03G15/08
CPCG03G15/0887G03G15/0879G03G15/0858
Inventor MATSUMOTO, JUNICHITSUDA, KIYONORITAKAMI, NOBUOTAKAHASHI, YUTAKAMIKUNIYA, KENTAROKONDOH, KEINOSUKEKAWAKAMI, AKIHIROKOIKE, TOSHIO
Owner RICOH KK
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